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1040748-42-2

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1040748-42-2 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 1040748-42-2 includes 10 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 7 digits, 1,0,4,0,7,4 and 8 respectively; the second part has 2 digits, 4 and 2 respectively.
Calculate Digit Verification of CAS Registry Number 1040748-42:
(9*1)+(8*0)+(7*4)+(6*0)+(5*7)+(4*4)+(3*8)+(2*4)+(1*2)=122
122 % 10 = 2
So 1040748-42-2 is a valid CAS Registry Number.

1040748-42-2Relevant articles and documents

Catalytic asymmetric dialkynylation reaction of α-dinitrone by utilizing tartaric acid ester as a chiral auxiliary

Serizawa, Masakazu,Fujinami, Shuhei,Ukaji, Yutaka,Inomata, Katsuhiko

, p. 921 - 931 (2008/09/21)

The asymmetric addition of alkynylzinc reagents, prepared in situ from dimethylzinc and 1-alkynes, to α-dinitrones derived from glyoxal and N-(4-isopropylbenzyl)hydroxylamine was investigated by utilizing dicyclohexyl (R,R)-tartrate as a chiral auxiliary. The addition reaction of methyl(2-phenylethynyl)zinc afforded the corresponding optically active C2-symmetric (R,R)-bis(hydroxylamine) derivative with enantioselectivities of 90% and 81% ee by utilizing a stoichiometric and catalytic amount of the tartrate, respectively. Furthermore, the catalytic addition reaction of several alkynylzinc reagents also furnished the corresponding bis(hydroxylamine) with moderate to good enantioselectivities.

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